On 28-04-2017, my computer took snapshots, every 7.1 seconds, of this very slow animation of 10 circles. These circles slowly rotate, and turn into a square, and then back to a circle. They all move at different speeds. They all have a different random colour. They all animate with a different animation timing function. And they are all blended with the so called difference blend mode, which makes each snapshot even more random.